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<title>&lt;sys/uio.h&gt;</title>
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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_009_393">&nbsp;</a>NAME</h4><blockquote>
sys/uio.h - definitions for vector I/O operations
</blockquote><h4><a name = "tag_000_009_394">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;sys/uio.h&gt;
</code>
</pre>
</blockquote><h4><a name = "tag_000_009_395">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>&lt;sys/uio.h&gt;</i>
header defines the
<b>iovec</b>
structure that includes at least the following members:
<pre>
<code>
void   *iov_base   base address of a memory region for input or output
size_t  iov_len    the size of the memory pointed to by <i>iov_base</i>
</code>
</pre>
<p>
The following are declared as functions and may also be defined as macros.
Function prototypes must be provided for use with an ISO C
compiler.
<pre>
<code>
ssize_t <a href="readv.html">readv</a>(int, const struct iovec *, int);
ssize_t <a href="writev.html">writev</a>(int, const struct iovec *, int);
</code>
</pre>
</blockquote><h4><a name = "tag_000_009_396">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_009_397">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_009_398">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="read.html">read()</a></i>,
<i><a href="write.html">write()</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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